//点击li时出现pic-mask遮罩
let lisDOM = document.querySelectorAll('.pic-list li');
let picMask = document.querySelectorAll('.pic-mask');
console.log(lisDOM);
for (let i = 0; i < lisDOM.length; i++) {
  lisDOM[i].onclick = function () {
    picMask[i].style.display = 'flex';
  }
}




